578 WALTUR K. COLLINGK. 



ceplialon, the mesosomatic and metasomatic segments, and 

 the telson. 



7. Philoscia Avarreni n. .sp. PI. XLII, figs. 10-20. 



Body oblong oval, smootli, metasonie abruptly narrower 

 than the mesosome. Cephalon (PI. XLII, figs. 10 and 11) 

 small, convex above, no definite frontal margin, rounded, 

 lateral lobes small, epistome flattened with well-marked 

 dorsal ridge. Eyes large, also ocelli, situated dorso-laterally. 

 Antennula3 (fig. 12) short and stout, 3-jointed, terminal joint 

 ^^'ith few setfe laterally and terminally, proximal end of 3rd 

 joint expanded. Antennae (figs. 13 and 14) long, 1st joint 

 very short, 2nd and 3rd stout and about equal in length, 

 grooved on their outer side, 4th and 5th joints elongated, 

 the latter the longer ; flagellum 3-jointed, the terminal joint 

 has the end thickened and there is a short style. First 

 maxilliB (tig. 15) with the outer lobe terminating in four blunt 

 curved spines, and four shoi'ter ones with bifid terminations ; 

 inner lobe produced as a spine on the outer border terminally 

 and Avith two setose spines on the inner side. Second 

 maxillae (fig. 16) with setose inner lobe, outer lobe very thin 

 and frag-ile. The seg-ments of the mesosome somewhat 

 depressed, terminal margin of pleural plates of segments 2-5 

 rounded, posterior angles inconspicuous, those of the 6th 

 and 7th produced backwards. Maxillipedes (fig. 17) with 

 shoi'tened lobes, outer one terminating in two multispinous 

 processes and one small spine ; inner lobe with single spine 

 only. The metasonie is abruptly narrower than the mesosome 

 and the pleural plates are not expanded or produced back- 

 wards. Uropoda (figs. 18 and 19) extending beyond the 

 telson, basal segment roughly ovoid with raised portions on 

 the inner side and ventro-laterally, with the inner one the 

 endopodite articulates and the exopodite with the ventro- 

 lateral one ; exopodite elongated, endopodite half the length 

 of the exopodite, triangular in section, both setaceous. 

 Telson (fig. 20) short and broad, laterally rounded, and pro- 

 duced as a blunt point terminally. 



